Fixed link type in README.md (#85)

The link to Materialized Views was broken and pointed to https://www.tinybird.co/docs/publish/materialized-columns instead of https://www.tinybird.co/docs/publish/materialized-views.

Updated the link in readme file.

README.md

@@ -18,7 +18,7 @@ Click this button to deploy the data project to Tinybird 👇
 
 [![Deploy to Tinybird](https://cdn.tinybird.co/static/images/Tinybird-Deploy-Button.svg)](https://ui.tinybird.co/workspaces/new?name=web_analytics&starter_kit=web-analytics-starter-kit)
 
-Follow the guided process, and your Tinybird workspace is now ready to start receiving events. All your Data Sources, [Materialized Views](https://www.tinybird.co/guide/materialized-columns) (to make the queries blazing fast), and API Endpoints should be installed and ready. If you go to the Data Flow tab in your browser you should see something like this:
+Follow the guided process, and your Tinybird workspace is now ready to start receiving events. All your Data Sources, [Materialized Views](https://www.tinybird.co/guide/materialized-views) (to make the queries blazing fast), and API Endpoints should be installed and ready. If you go to the Data Flow tab in your browser you should see something like this:
 
 ![Data flow](./assets/img/data_flow.png)